Synchronous hermaphroditism and self-fertilization in a captive shortnose sturgeon

James P. Henne, Kent M. Ware, William R. Wayman, Robert S. Bakal, A. Horváth

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The shortnose sturgeon Acipenser brevirostrum is a federally listed endangered fish species endemic to the East Coast of North America, where captive fish are cultured for recovery efforts. During routine evaluations of broodfish for spawning potential, a single hermaphroditic shortnose sturgeon was discovered. Motile sperm and approximately 7,600 eggs were manually stripped from the individual simultaneously. Eggs were fertilized with the fish's own sperm (self-fertilized) and with the sperm of two unrelated males (cross-fertilized). Both self- and cross-fertilization procedures were successful. Viable fry hatched from 9% of the eggs produced by self-fertilization and from 2% of those produced by cross-fertilization. Fry survival through 180 d posthatch was 1% in the self-fertilization treatment and 11% in the cross-fertilization treatment. Endoscopic evaluation of gonads confirmed the presence of ovotestes with discrete regions of active testicular and ovarian tissues. The present account provides empirical evidence including gross anatomical and histological photodocumentation that advances knowledge of this rare condition in a fish species threatened with extinction.

Original languageEnglish
Pages (from-to)55-60
Number of pages6
JournalTransactions of the American Fisheries Society
Volume135
Issue number1
DOIs
Publication statusPublished - Jan 2006

Fingerprint

Acipenser brevirostrum
fish roe
hermaphroditism
autogamy
fertilization (reproduction)
selfing
spermatozoa
sperm
fish fry
fish
egg
threatened species
endangered species
gonads
indigenous species
extinction
spawning
endemic species
coasts
coast

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Synchronous hermaphroditism and self-fertilization in a captive shortnose sturgeon. / Henne, James P.; Ware, Kent M.; Wayman, William R.; Bakal, Robert S.; Horváth, A.

In: Transactions of the American Fisheries Society, Vol. 135, No. 1, 01.2006, p. 55-60.

Research output: Contribution to journalArticle

Henne, James P. ; Ware, Kent M. ; Wayman, William R. ; Bakal, Robert S. ; Horváth, A. / Synchronous hermaphroditism and self-fertilization in a captive shortnose sturgeon. In: Transactions of the American Fisheries Society. 2006 ; Vol. 135, No. 1. pp. 55-60.
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